package com.tuozixuan.common;

import java.io.IOException;
import java.util.Objects;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.BeanProperty;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.ser.ContextualSerializer;
import com.tuozixuan.common.annotation.Sensitive;
import com.tuozixuan.common.constant.SensitiveStrategy;

/**
 * 序列化注解自定义实现
 * JsonSerializer<String>：指定String 类型，serialize()方法用于将修改后的数据载入
 */
public class SensitiveJsonSerializer extends JsonSerializer<String> implements ContextualSerializer  {
	
	 private SensitiveStrategy strategy;

	@Override
	public void serialize(String value, JsonGenerator gen, SerializerProvider serializers) throws IOException {
		 gen.writeString(strategy.desensitizer().apply(value));
	}

	/**
     * 获取属性上的注解属性
     */
	@Override
	public JsonSerializer<?> createContextual(SerializerProvider prov, BeanProperty property)
			throws JsonMappingException {
        Sensitive annotation = property.getAnnotation(Sensitive.class);
        if (Objects.nonNull(annotation)&&Objects.equals(String.class, property.getType().getRawClass())) {
            this.strategy = annotation.strategy();
            return this;
        }
        return prov.findValueSerializer(property.getType(), property);
	}

}
